uint16 error_code
string error_info
uint8 priority  #当前做大优先级  0 //紧急停车 1 //降速 2 //警告 3 //正常

uint8 Stop_Priority = 0        #紧急停车 
uint8 Speed_Down_Priority = 1  #降速
uint8 Error_Priority = 2       #警告
uint8 Normal_Priority = 3      #正常
